Book-press for color-printing.



N. P. TURNBLADH.

BOOK PRESS FOR COLOR PRINTING. APPLIOATION FILED AUG. 26, 1908.

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922,542 Patented May 25, 1909.

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N. P. TORNBLADH. BOOK PRESS FOR COLOR PRINTING. APJZLIGATION FILED AUG. 26, 1908.

Patented May 25, 1909.

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B OGK-FBESS FOP UOLOR-PRINTING.

No. 922,5ee.

Elpecification of Letters Patent.

Application filed August 26, 1908.

latented May e5, 1909.

Serial N0. 450,273.

T 0 all whom it may concern:

Be it known that l, NILs PETER- TORN- BLADI'I, residin at G-ottenborg, in the country of Sweden, have invented new and useful Improvements in Book-Presses for Color- Printing, of which the following is a specification.

My invention relates to book-presses for simultaneous printing of several colors.

It is old to use two or more printing-cylindcrs, provided at their working surfaces with openings and elevations and arranged after or beside each other for simultaneous printing of different colors on different spots. To permit the turning of these cylinders in rela tion to each other and keeping them in the wanted position for placing the different colors on the form it is old to provide said cylinders with metallic center-sockets, the ends of which are provided with teeth, which grasp into corresponding hooks of the next cylinder. The least turning, which thus can be obtained, equals the pitch of the teeth, but as the teeth are placed near the center of the cylinder and must be of a certain thickness, the movement of the periphery of the cylinder will be rather considerable, corresponding to several lines. Another inconvenience of these presses arises thereby, that the cylinders are driven only through the friction against other cylinders, whereby a sliding of the cylinders in relation to the form may easily occur, and the different colored spots thus interfere with each other. I have fully removed these faults by providing both ends of each cylinder with wooden or metallic disks in which are grooves or holes. At one end of each cylinder many of such grooves or holes are arranged in concentric circles with large radii, but at the other end there is only one or a few corresponding holes before each one of the concentric holecircles in the neighboring cylinder. In said holes I insert a bolt between two neighboring cylinders and thus secure them in the wanted relative position. The cylinders are driven by toothed wheels, geared with a rack on the form, and thus an exact motion relative the form is obtained.

On the accompanying drawing Figure 1 is a side elevation of the press, partly in section and Fig. 2 is a plan view of same. Fig. 3 is a compound color-cylinder partly in section, Fig. 4 an end view of a cylinder from the one end and Fig. 5 from the opposite end. Fig.

6 shows in section the ends of two color-cylinders somewhat separated. A desired number of color-cylinders l are placed after and beside each. other over the form 2, which has a reciprocating movement when working. Each cylinder is composed of several parts on a common shaft (three on the drawing), which may be moved to and from or turned relative to each other and secured in a wanted relative position.

According to my invention each cylinder is provided with a wooden or metallic disk 3 at each of its ends, which disks 1 provide with holes or grooves, so that a rather large numher is arranged in concentric circles around the shaft at one end of the cylinder. The holes in the different circles displace each other, so that'they, Jithout decreasing the strength of the disk 3, may be arranged as close together, that the distance, measured at the working surface of the cylinder, which corresponds to the angle between the radius through the center of two neighboring holes in two consecutive circles equals the least wanted turning between two neighboring cylinders, i. a, equal to the distance be tween the lines in the form. The disk 3 at the end of the neighboring cylinder, which faces the said one, I provide with similar grooves or holes 5 but only one or a few of these in each circle. The holes 5, if only one in each circle, may be arranged all on the same radius, but it is suitable to arrange them on different radii in order not to decrease the strength of the disk 3. Said radii may then form an angle, which equals the angle between the radius through two neighboring holes 4 on a common circle. Two

neighboring cylinders having been turned relative each other so that a hole 5 in the end disk of the one corresponds to a hole 4 in the end disk of the other, I insert a bolt 6 in the two holes and tie the cylinders together by a screw and nut 7 at one end of the common shaft. Thus an unintentional relative turning of the cylinders is prevented not only by means of the bolt 6 but also through the friction at the two end surfaces touching each other. The toothed wheel 8 on the common cylinder-shaft gears into the rack 9 on the form thus transmitting the reciprocating movement of the latter, causing an exact rotation in relation to the form without possibility of sliding.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a press for simultaneously printing with different colors, the combination of a shaft, color-cylinders arranged end to end on the shaft; one of said cylinders being adj ustable about the shaft, with respect to the other cylinder, means at the adjacent ends of the cylinders for cooperating with other means to adjustably fix the cylinders together, and the said other means.

2. In a press for simultaneously printing with difierent colors, the combination of a shaft, color cylinders arranged end to end on the shaft; one of the said cylinders being adjustable about the shaft, with respect to the other cylinder, and one cylinder having in one end a circular series of apertures, and the other cylinder having in its end opposed to the apertured end of the first named cylinder an aperture positioned for registration with the apertures in the circular series, and a bolt removably arranged in registered apertures of the cylinders.

3. In a press for simultaneously printing with different colors, the combination of color cylinders having openings and elevations on their working surfaces, a shaft on which said cylinders are loosely mounted, a disk at one end of one cylinder having numerous apertures arranged in concentric circles, a disk at the o posed end of the other cylinder having at different distances from its center apertures each of which is adapted to be registered with the apertures in one of the circles in the disk of the first named cylinder, and a bolt ada ted to be inserted in the apertures of the cy inders and extend between the cylinders to lock the same to gether.

4. In a press for simultaneously printing with different colors, the combination of color cylinders having openings and elevations on their working surfaces, disks at both ends of said cylinders; one of the disks of each cylinder having numerous apertures arranged in concentric circles, the distance measured at the working surface of the cylinder between the radius through the center of the neighboring holes in consecutive circles equaling the distance between two consecutive lines in the form, and the other disk having at different distances from its center apertures each of which is adapted to be registered with a )ertures in one of the circles in the opposed risk of another cylinder, a bolt removably arranged in registered apertures of the cylinders, and a toothed wheel at the end of one cylinder, the said form, and a rack on the form, engaged with the said toothed wheel.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

NILS PETER TORNBLADH. Witnesses ROBERT SHARSTEDT, V. LIND UIST. 

